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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Sergey Bondari |
2 | * Copyright (c) 2006 Sergey Bondari |
3 | * Copyright (c) 2006 Jakub Jermar |
3 | * Copyright (c) 2006 Jakub Jermar |
4 | * Copyright (c) 2008 Jiri Svoboda |
4 | * Copyright (c) 2008 Jiri Svoboda |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
9 | * are met: |
10 | * |
10 | * |
11 | * - Redistributions of source code must retain the above copyright |
11 | * - Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * - Redistributions in binary form must reproduce the above copyright |
13 | * - Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
15 | * documentation and/or other materials provided with the distribution. |
16 | * - The name of the author may not be used to endorse or promote products |
16 | * - The name of the author may not be used to endorse or promote products |
17 | * derived from this software without specific prior written permission. |
17 | * derived from this software without specific prior written permission. |
18 | * |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | */ |
29 | */ |
30 | 30 | ||
31 | /** @addtogroup generic |
31 | /** @addtogroup generic |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | 34 | ||
35 | /** |
35 | /** |
36 | * @file |
36 | * @file |
37 | * @brief Kernel ELF loader. |
37 | * @brief Kernel ELF loader. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <stdio.h> |
40 | #include <stdio.h> |
41 | #include <sys/types.h> |
41 | #include <sys/types.h> |
42 | #include <align.h> |
42 | #include <align.h> |
43 | #include <assert.h> |
43 | #include <assert.h> |
44 | #include <as.h> |
44 | #include <as.h> |
45 | #include <unistd.h> |
45 | #include <unistd.h> |
46 | #include <fcntl.h> |
46 | #include <fcntl.h> |
47 | 47 | ||
48 | #include "elf.h" |
48 | #include "elf.h" |
49 | #include "pcb.h" |
49 | #include "pcb.h" |
50 | #include "elf_load.h" |
50 | #include "elf_load.h" |
51 | 51 | ||
52 | #define RTLD_BIAS 0x80000 |
- | |
53 | //#define RTLD_BIAS 0 |
- | |
54 | - | ||
55 | static char *error_codes[] = { |
52 | static char *error_codes[] = { |
56 | "no error", |
53 | "no error", |
57 | "invalid image", |
54 | "invalid image", |
58 | "address space error", |
55 | "address space error", |
59 | "incompatible image", |
56 | "incompatible image", |
60 | "unsupported image type", |
57 | "unsupported image type", |
61 | "irrecoverable error" |
58 | "irrecoverable error" |
62 | }; |
59 | }; |
63 | 60 | ||
64 | static unsigned int elf_load(elf_ld_t *elf); |
61 | static unsigned int elf_load(elf_ld_t *elf, size_t so_bias); |
65 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
62 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry); |
66 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
63 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry); |
67 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
64 | static int load_segment(elf_ld_t *elf, elf_segment_header_t *entry); |
68 | 65 | ||
69 | int elf_load_file(char *file_name, elf_info_t *info) |
66 | int elf_load_file(char *file_name, size_t so_bias, elf_info_t *info) |
70 | { |
67 | { |
71 | elf_ld_t elf; |
68 | elf_ld_t elf; |
72 | 69 | ||
73 | int fd; |
70 | int fd; |
74 | int rc; |
71 | int rc; |
75 | 72 | ||
76 | printf("open and read '%s'...\n", file_name); |
73 | printf("open and read '%s'...\n", file_name); |
77 | 74 | ||
78 | fd = open(file_name, 0); |
75 | fd = open(file_name, 0); |
79 | if (fd < 0) { |
76 | if (fd < 0) { |
80 | printf("failed opening file\n"); |
77 | printf("failed opening file\n"); |
81 | return -1; |
78 | return -1; |
82 | } |
79 | } |
83 | 80 | ||
84 | elf.fd = fd; |
81 | elf.fd = fd; |
85 | elf.info = info; |
82 | elf.info = info; |
86 | 83 | ||
87 | rc = elf_load(&elf); |
84 | rc = elf_load(&elf, so_bias); |
88 | printf("elf_load() -> %d\n", rc); |
85 | printf("elf_load() -> %d\n", rc); |
89 | 86 | ||
90 | close(fd); |
87 | close(fd); |
91 | 88 | ||
92 | return rc; |
89 | return rc; |
93 | } |
90 | } |
94 | 91 | ||
95 | void elf_run(elf_info_t *info) |
92 | void elf_run(elf_info_t *info) |
96 | { |
93 | { |
97 | (*info->entry)(); |
94 | (*info->entry)(); |
98 | 95 | ||
99 | /* not reached */ |
96 | /* not reached */ |
100 | } |
97 | } |
101 | 98 | ||
102 | int elf_create_pcb(elf_info_t *info) |
99 | int elf_create_pcb(elf_info_t *info) |
103 | { |
100 | { |
104 | pcb_t *pcb; |
101 | pcb_t *pcb; |
105 | void *a; |
102 | void *a; |
106 | 103 | ||
107 | pcb = (pcb_t *)PCB_ADDRESS; |
104 | pcb = (pcb_t *)PCB_ADDRESS; |
108 | 105 | ||
109 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
106 | a = as_area_create(pcb, sizeof(pcb_t), AS_AREA_READ | AS_AREA_WRITE); |
110 | if (a == (void *)(-1)) { |
107 | if (a == (void *)(-1)) { |
111 | printf("elf_create_pcb: memory mapping failed\n"); |
108 | printf("elf_create_pcb: memory mapping failed\n"); |
112 | return EE_MEMORY; |
109 | return EE_MEMORY; |
113 | } |
110 | } |
114 | 111 | ||
115 | pcb->entry = info->entry; |
112 | pcb->entry = info->entry; |
116 | pcb->dynamic = info->dynamic; |
113 | pcb->dynamic = info->dynamic; |
117 | 114 | ||
118 | return 0; |
115 | return 0; |
119 | } |
116 | } |
120 | 117 | ||
121 | 118 | ||
122 | /** ELF loader |
119 | /** ELF loader |
123 | * |
120 | * |
124 | * @param header Pointer to ELF header in memory |
121 | * @param header Pointer to ELF header in memory |
125 | * @return EE_OK on success |
122 | * @return EE_OK on success |
126 | */ |
123 | */ |
127 | static unsigned int elf_load(elf_ld_t *elf) |
124 | static unsigned int elf_load(elf_ld_t *elf, size_t so_bias) |
128 | { |
125 | { |
129 | elf_header_t header_buf; |
126 | elf_header_t header_buf; |
130 | elf_header_t *header = &header_buf; |
127 | elf_header_t *header = &header_buf; |
131 | int i, rc; |
128 | int i, rc; |
132 | 129 | ||
133 | rc = read(elf->fd, header, sizeof(elf_header_t)); |
130 | rc = read(elf->fd, header, sizeof(elf_header_t)); |
134 | if (rc < 0) { |
131 | if (rc < 0) { |
135 | printf("read error\n"); |
132 | printf("read error\n"); |
136 | return EE_INVALID; |
133 | return EE_INVALID; |
137 | } |
134 | } |
138 | 135 | ||
139 | elf->header = header; |
136 | elf->header = header; |
140 | 137 | ||
141 | printf("ELF-load:"); |
138 | printf("ELF-load:"); |
142 | /* Identify ELF */ |
139 | /* Identify ELF */ |
143 | if (header->e_ident[EI_MAG0] != ELFMAG0 || |
140 | if (header->e_ident[EI_MAG0] != ELFMAG0 || |
144 | header->e_ident[EI_MAG1] != ELFMAG1 || |
141 | header->e_ident[EI_MAG1] != ELFMAG1 || |
145 | header->e_ident[EI_MAG2] != ELFMAG2 || |
142 | header->e_ident[EI_MAG2] != ELFMAG2 || |
146 | header->e_ident[EI_MAG3] != ELFMAG3) { |
143 | header->e_ident[EI_MAG3] != ELFMAG3) { |
147 | printf("invalid header\n"); |
144 | printf("invalid header\n"); |
148 | return EE_INVALID; |
145 | return EE_INVALID; |
149 | } |
146 | } |
150 | 147 | ||
151 | /* Identify ELF compatibility */ |
148 | /* Identify ELF compatibility */ |
152 | if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || |
149 | if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || |
153 | header->e_machine != ELF_MACHINE || |
150 | header->e_machine != ELF_MACHINE || |
154 | header->e_ident[EI_VERSION] != EV_CURRENT || |
151 | header->e_ident[EI_VERSION] != EV_CURRENT || |
155 | header->e_version != EV_CURRENT || |
152 | header->e_version != EV_CURRENT || |
156 | header->e_ident[EI_CLASS] != ELF_CLASS) { |
153 | header->e_ident[EI_CLASS] != ELF_CLASS) { |
157 | printf("incompatible data/version/class\n"); |
154 | printf("incompatible data/version/class\n"); |
158 | return EE_INCOMPATIBLE; |
155 | return EE_INCOMPATIBLE; |
159 | } |
156 | } |
160 | 157 | ||
161 | if (header->e_phentsize != sizeof(elf_segment_header_t)) |
158 | if (header->e_phentsize != sizeof(elf_segment_header_t)) |
162 | return EE_INCOMPATIBLE; |
159 | return EE_INCOMPATIBLE; |
163 | 160 | ||
164 | if (header->e_shentsize != sizeof(elf_section_header_t)) |
161 | if (header->e_shentsize != sizeof(elf_section_header_t)) |
165 | return EE_INCOMPATIBLE; |
162 | return EE_INCOMPATIBLE; |
166 | 163 | ||
167 | /* Check if the object type is supported. */ |
164 | /* Check if the object type is supported. */ |
168 | if (header->e_type != ET_EXEC && header->e_type != ET_DYN) { |
165 | if (header->e_type != ET_EXEC && header->e_type != ET_DYN) { |
169 | printf("Object type %d is not supported\n", header->e_type); |
166 | printf("Object type %d is not supported\n", header->e_type); |
170 | return EE_UNSUPPORTED; |
167 | return EE_UNSUPPORTED; |
171 | } |
168 | } |
172 | 169 | ||
173 | /* The run-time dynamic linker is loaded with a bias */ |
170 | /* Shared objects can be loaded with a bias */ |
174 | printf("Object type: %d\n", header->e_type); |
171 | printf("Object type: %d\n", header->e_type); |
175 | if (header->e_type == ET_DYN) |
172 | if (header->e_type == ET_DYN) |
176 | elf->bias = RTLD_BIAS; |
173 | elf->bias = so_bias; |
177 | else |
174 | else |
178 | elf->bias = 0; |
175 | elf->bias = 0; |
179 | 176 | ||
180 | printf("Bias set to 0x%d\n", elf->bias); |
177 | printf("Bias set to 0x%x\n", elf->bias); |
181 | 178 | ||
182 | printf("parse segments\n"); |
179 | printf("parse segments\n"); |
183 | 180 | ||
184 | /* Walk through all segment headers and process them. */ |
181 | /* Walk through all segment headers and process them. */ |
185 | for (i = 0; i < header->e_phnum; i++) { |
182 | for (i = 0; i < header->e_phnum; i++) { |
186 | elf_segment_header_t segment_hdr; |
183 | elf_segment_header_t segment_hdr; |
187 | 184 | ||
188 | /* Seek to start of segment header */ |
185 | /* Seek to start of segment header */ |
189 | lseek(elf->fd, header->e_phoff |
186 | lseek(elf->fd, header->e_phoff |
190 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
187 | + i * sizeof(elf_segment_header_t), SEEK_SET); |
191 | 188 | ||
192 | rc = read(elf->fd, &segment_hdr, sizeof(elf_segment_header_t)); |
189 | rc = read(elf->fd, &segment_hdr, sizeof(elf_segment_header_t)); |
193 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
190 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
194 | 191 | ||
195 | rc = segment_header(elf, &segment_hdr); |
192 | rc = segment_header(elf, &segment_hdr); |
196 | if (rc != EE_OK) |
193 | if (rc != EE_OK) |
197 | return rc; |
194 | return rc; |
198 | } |
195 | } |
199 | 196 | ||
200 | printf("parse sections\n"); |
197 | printf("parse sections\n"); |
201 | 198 | ||
202 | /* Inspect all section headers and proccess them. */ |
199 | /* Inspect all section headers and proccess them. */ |
203 | for (i = 0; i < header->e_shnum; i++) { |
200 | for (i = 0; i < header->e_shnum; i++) { |
204 | elf_section_header_t section_hdr; |
201 | elf_section_header_t section_hdr; |
205 | 202 | ||
206 | /* Seek to start of section header */ |
203 | /* Seek to start of section header */ |
207 | lseek(elf->fd, header->e_shoff |
204 | lseek(elf->fd, header->e_shoff |
208 | + i * sizeof(elf_section_header_t), SEEK_SET); |
205 | + i * sizeof(elf_section_header_t), SEEK_SET); |
209 | 206 | ||
210 | rc = read(elf->fd, §ion_hdr, sizeof(elf_section_header_t)); |
207 | rc = read(elf->fd, §ion_hdr, sizeof(elf_section_header_t)); |
211 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
208 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
212 | 209 | ||
213 | rc = section_header(elf, §ion_hdr); |
210 | rc = section_header(elf, §ion_hdr); |
214 | if (rc != EE_OK) |
211 | if (rc != EE_OK) |
215 | return rc; |
212 | return rc; |
216 | } |
213 | } |
217 | 214 | ||
218 | elf->info->entry = |
215 | elf->info->entry = |
219 | (entry_point_t)((uint8_t *)header->e_entry + elf->bias); |
216 | (entry_point_t)((uint8_t *)header->e_entry + elf->bias); |
220 | 217 | ||
221 | printf("done\n"); |
218 | printf("done\n"); |
222 | 219 | ||
223 | return EE_OK; |
220 | return EE_OK; |
224 | } |
221 | } |
225 | 222 | ||
226 | /** Print error message according to error code. |
223 | /** Print error message according to error code. |
227 | * |
224 | * |
228 | * @param rc Return code returned by elf_load(). |
225 | * @param rc Return code returned by elf_load(). |
229 | * |
226 | * |
230 | * @return NULL terminated description of error. |
227 | * @return NULL terminated description of error. |
231 | */ |
228 | */ |
232 | char *elf_error(unsigned int rc) |
229 | char *elf_error(unsigned int rc) |
233 | { |
230 | { |
234 | assert(rc < sizeof(error_codes) / sizeof(char *)); |
231 | assert(rc < sizeof(error_codes) / sizeof(char *)); |
235 | 232 | ||
236 | return error_codes[rc]; |
233 | return error_codes[rc]; |
237 | } |
234 | } |
238 | 235 | ||
239 | /** Process segment header. |
236 | /** Process segment header. |
240 | * |
237 | * |
241 | * @param entry Segment header. |
238 | * @param entry Segment header. |
242 | * @param elf ELF header. |
239 | * @param elf ELF header. |
243 | * |
240 | * |
244 | * @return EE_OK on success, error code otherwise. |
241 | * @return EE_OK on success, error code otherwise. |
245 | */ |
242 | */ |
246 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry) |
243 | static int segment_header(elf_ld_t *elf, elf_segment_header_t *entry) |
247 | { |
244 | { |
248 | switch (entry->p_type) { |
245 | switch (entry->p_type) { |
249 | case PT_NULL: |
246 | case PT_NULL: |
250 | case PT_PHDR: |
247 | case PT_PHDR: |
251 | break; |
248 | break; |
252 | case PT_LOAD: |
249 | case PT_LOAD: |
253 | return load_segment(elf, entry); |
250 | return load_segment(elf, entry); |
254 | break; |
251 | break; |
255 | case PT_DYNAMIC: |
252 | case PT_DYNAMIC: |
256 | case PT_INTERP: |
253 | case PT_INTERP: |
257 | case PT_SHLIB: |
254 | case PT_SHLIB: |
258 | case PT_NOTE: |
255 | case PT_NOTE: |
259 | case PT_LOPROC: |
256 | case PT_LOPROC: |
260 | case PT_HIPROC: |
257 | case PT_HIPROC: |
261 | default: |
258 | default: |
262 | printf("segment p_type %d unknown\n", entry->p_type); |
259 | printf("segment p_type %d unknown\n", entry->p_type); |
263 | return EE_UNSUPPORTED; |
260 | return EE_UNSUPPORTED; |
264 | break; |
261 | break; |
265 | } |
262 | } |
266 | return EE_OK; |
263 | return EE_OK; |
267 | } |
264 | } |
268 | 265 | ||
269 | /** Load segment described by program header entry. |
266 | /** Load segment described by program header entry. |
270 | * |
267 | * |
271 | * @param entry Program header entry describing segment to be loaded. |
268 | * @param entry Program header entry describing segment to be loaded. |
272 | * @param elf ELF header. |
269 | * @param elf ELF header. |
273 | * |
270 | * |
274 | * @return EE_OK on success, error code otherwise. |
271 | * @return EE_OK on success, error code otherwise. |
275 | */ |
272 | */ |
276 | int load_segment(elf_ld_t *elf, elf_segment_header_t *entry) |
273 | int load_segment(elf_ld_t *elf, elf_segment_header_t *entry) |
277 | { |
274 | { |
278 | void *a; |
275 | void *a; |
279 | int flags = 0; |
276 | int flags = 0; |
280 | uintptr_t bias; |
277 | uintptr_t bias; |
281 | int rc; |
278 | int rc; |
282 | 279 | ||
283 | printf("load segment at addr 0x%x, size 0x%x\n", entry->p_vaddr, |
280 | printf("load segment at addr 0x%x, size 0x%x\n", entry->p_vaddr, |
284 | entry->p_memsz); |
281 | entry->p_memsz); |
285 | 282 | ||
286 | bias = elf->bias; |
283 | bias = elf->bias; |
287 | 284 | ||
288 | if (entry->p_align > 1) { |
285 | if (entry->p_align > 1) { |
289 | if ((entry->p_offset % entry->p_align) != |
286 | if ((entry->p_offset % entry->p_align) != |
290 | (entry->p_vaddr % entry->p_align)) { |
287 | (entry->p_vaddr % entry->p_align)) { |
291 | printf("align check 1 failed offset%%align=%d, vaddr%%align=%d\n", |
288 | printf("align check 1 failed offset%%align=%d, vaddr%%align=%d\n", |
292 | entry->p_offset % entry->p_align, |
289 | entry->p_offset % entry->p_align, |
293 | entry->p_vaddr % entry->p_align |
290 | entry->p_vaddr % entry->p_align |
294 | ); |
291 | ); |
295 | return EE_INVALID; |
292 | return EE_INVALID; |
296 | } |
293 | } |
297 | } |
294 | } |
298 | 295 | ||
299 | /* if (entry->p_flags & PF_X) |
296 | /* if (entry->p_flags & PF_X) |
300 | flags |= AS_AREA_EXEC; |
297 | flags |= AS_AREA_EXEC; |
301 | if (entry->p_flags & PF_W) |
298 | if (entry->p_flags & PF_W) |
302 | flags |= AS_AREA_WRITE; |
299 | flags |= AS_AREA_WRITE; |
303 | if (entry->p_flags & PF_R) |
300 | if (entry->p_flags & PF_R) |
304 | flags |= AS_AREA_READ; |
301 | flags |= AS_AREA_READ; |
305 | flags |= AS_AREA_CACHEABLE; |
302 | flags |= AS_AREA_CACHEABLE; |
306 | */ |
303 | */ |
307 | /* FIXME: Kernel won't normally allow this, unless you "patch" it */ |
304 | /* FIXME: Kernel won't normally allow this, unless you "patch" it */ |
308 | // flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_EXEC | AS_AREA_CACHEABLE; |
305 | // flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_EXEC | AS_AREA_CACHEABLE; |
309 | flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
306 | flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
310 | 307 | ||
311 | /* |
308 | /* |
312 | * Check if the virtual address starts on page boundary. |
309 | * Check if the virtual address starts on page boundary. |
313 | */ |
310 | */ |
314 | if (ALIGN_UP(entry->p_vaddr, PAGE_SIZE) != entry->p_vaddr) { |
311 | if (ALIGN_UP(entry->p_vaddr, PAGE_SIZE) != entry->p_vaddr) { |
315 | printf("align check 2 failed - not page-aligned\n"); |
312 | printf("align check 2 failed - not page-aligned\n"); |
316 | printf("vaddr = 0x%x, should be 0x%x\n", |
313 | printf("vaddr = 0x%x, should be 0x%x\n", |
317 | entry->p_vaddr, ALIGN_UP(entry->p_vaddr, PAGE_SIZE)); |
314 | entry->p_vaddr, ALIGN_UP(entry->p_vaddr, PAGE_SIZE)); |
318 | return EE_UNSUPPORTED; |
315 | return EE_UNSUPPORTED; |
319 | } |
316 | } |
320 | 317 | ||
321 | printf("map to p_vaddr=0x%x-0x%x...\n", entry->p_vaddr + bias, |
318 | printf("map to p_vaddr=0x%x-0x%x...\n", entry->p_vaddr + bias, |
322 | entry->p_vaddr + bias + ALIGN_UP(entry->p_memsz, PAGE_SIZE)); |
319 | entry->p_vaddr + bias + ALIGN_UP(entry->p_memsz, PAGE_SIZE)); |
323 | 320 | ||
324 | a = as_area_create((uint8_t *)entry->p_vaddr + bias, |
321 | a = as_area_create((uint8_t *)entry->p_vaddr + bias, |
325 | entry->p_memsz, flags); |
322 | entry->p_memsz, flags); |
326 | if (a == (void *)(-1)) { |
323 | if (a == (void *)(-1)) { |
327 | printf("memory mapping failed\n"); |
324 | printf("memory mapping failed\n"); |
328 | return EE_MEMORY; |
325 | return EE_MEMORY; |
329 | } |
326 | } |
330 | 327 | ||
331 | printf("as_area_create(0x%x, 0x%x, %d) -> 0x%x\n", |
328 | printf("as_area_create(0x%x, 0x%x, %d) -> 0x%x\n", |
332 | entry->p_vaddr+bias, entry->p_memsz, flags, (unsigned)a); |
329 | entry->p_vaddr+bias, entry->p_memsz, flags, (unsigned)a); |
333 | 330 | ||
334 | /* |
331 | /* |
335 | * Load segment data |
332 | * Load segment data |
336 | */ |
333 | */ |
337 | printf("seek to %d\n", entry->p_offset); |
334 | printf("seek to %d\n", entry->p_offset); |
338 | rc = lseek(elf->fd, entry->p_offset, SEEK_SET); |
335 | rc = lseek(elf->fd, entry->p_offset, SEEK_SET); |
339 | if (rc < 0) { printf("seek error\n"); return EE_INVALID; } |
336 | if (rc < 0) { printf("seek error\n"); return EE_INVALID; } |
340 | 337 | ||
341 | printf("read 0x%x bytes to address 0x%x\n", entry->p_filesz, entry->p_vaddr+bias); |
338 | printf("read 0x%x bytes to address 0x%x\n", entry->p_filesz, entry->p_vaddr+bias); |
342 | /* rc = read(fd, (void *)(entry->p_vaddr + bias), entry->p_filesz); |
339 | /* rc = read(fd, (void *)(entry->p_vaddr + bias), entry->p_filesz); |
343 | if (rc < 0) { printf("read error\n"); return EE_INVALID; }*/ |
340 | if (rc < 0) { printf("read error\n"); return EE_INVALID; }*/ |
344 | unsigned left, now; |
341 | unsigned left, now; |
345 | uint8_t *dp; |
342 | uint8_t *dp; |
346 | 343 | ||
347 | left = entry->p_filesz; |
344 | left = entry->p_filesz; |
348 | dp = (uint8_t *)(entry->p_vaddr + bias); |
345 | dp = (uint8_t *)(entry->p_vaddr + bias); |
349 | 346 | ||
350 | while (left > 0) { |
347 | while (left > 0) { |
351 | now = 4096; |
348 | now = 4096; |
352 | if (now > left) now=left; |
349 | if (now > left) now=left; |
353 | printf("read %d...", now); |
350 | printf("read %d...", now); |
354 | rc = read(elf->fd, dp, now); |
351 | rc = read(elf->fd, dp, now); |
355 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
352 | if (rc < 0) { printf("read error\n"); return EE_INVALID; } |
356 | printf("->%d\n", rc); |
353 | printf("->%d\n", rc); |
357 | left -= now; |
354 | left -= now; |
358 | dp += now; |
355 | dp += now; |
359 | } |
356 | } |
360 | 357 | ||
361 | return EE_OK; |
358 | return EE_OK; |
362 | } |
359 | } |
363 | 360 | ||
364 | /** Process section header. |
361 | /** Process section header. |
365 | * |
362 | * |
366 | * @param entry Segment header. |
363 | * @param entry Segment header. |
367 | * @param elf ELF header. |
364 | * @param elf ELF header. |
368 | * |
365 | * |
369 | * @return EE_OK on success, error code otherwise. |
366 | * @return EE_OK on success, error code otherwise. |
370 | */ |
367 | */ |
371 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry) |
368 | static int section_header(elf_ld_t *elf, elf_section_header_t *entry) |
372 | { |
369 | { |
373 | switch (entry->sh_type) { |
370 | switch (entry->sh_type) { |
374 | case SHT_PROGBITS: |
371 | case SHT_PROGBITS: |
375 | if (entry->sh_flags & SHF_TLS) { |
372 | if (entry->sh_flags & SHF_TLS) { |
376 | /* .tdata */ |
373 | /* .tdata */ |
377 | } |
374 | } |
378 | break; |
375 | break; |
379 | case SHT_NOBITS: |
376 | case SHT_NOBITS: |
380 | if (entry->sh_flags & SHF_TLS) { |
377 | if (entry->sh_flags & SHF_TLS) { |
381 | /* .tbss */ |
378 | /* .tbss */ |
382 | } |
379 | } |
383 | break; |
380 | break; |
384 | case SHT_DYNAMIC: |
381 | case SHT_DYNAMIC: |
385 | elf->info->dynamic = |
382 | elf->info->dynamic = |
386 | (void *)((uint8_t *)entry->sh_addr + elf->bias); |
383 | (void *)((uint8_t *)entry->sh_addr + elf->bias); |
387 | printf("dynamic section found at 0x%x\n", |
384 | printf("dynamic section found at 0x%x\n", |
388 | (uintptr_t)elf->info->dynamic); |
385 | (uintptr_t)elf->info->dynamic); |
389 | break; |
386 | break; |
390 | default: |
387 | default: |
391 | break; |
388 | break; |
392 | } |
389 | } |
393 | 390 | ||
394 | return EE_OK; |
391 | return EE_OK; |
395 | } |
392 | } |
396 | 393 | ||
397 | /** @} |
394 | /** @} |
398 | */ |
395 | */ |
399 | 396 |